16504216 has 16 divisors (see below), whose sum is σ = 30988800. Its totient is φ = 8240544.

The previous prime is 16504211. The next prime is 16504223. The reversal of 16504216 is 61240561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16504211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9426 + ... + 11038.

It is an arithmetic number, because the mean of its divisors is an integer number (1936800).

Almost surely, 2^16504216 is an apocalyptic number.

It is an amenable number.

16504216 is a deficient number, since it is larger than the sum of its proper divisors (14484584).

16504216 is a wasteful number, since it uses less digits than its factorization.

16504216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898 (or 2894 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 16504216 is about 4062.5381228980. The cubic root of 16504216 is about 254.6038498369.

Adding to 16504216 its reverse (61240561), we get a palindrome (77744777).

The spelling of 16504216 in words is "sixteen million, five hundred four thousand, two hundred sixteen".